Hanger for trolley-wires.



W. A. MGCA'LLUM.

HANGER FOR TROLLEY WIRES.

APPLICATION FILED MAY 19| 1910.

Patented Mar. 14, 1911.

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WILLIAM a. McCALLUM,' or CINQINNATI, omo.v

HANGER `F013'. TRO'LLY-WIRES.

specification of Letters raten.

Patented Mar. Mi, limit.

Application led May 19, 1910. Serial No. 562,149.

head suspension of the trolley wires of electric railways; and is in the nature of an .nnprovement upon .that system in which,

1 -rmvireiby the Wave 4hanger of strips of metal, in which re-adjust the level from a messenger cable, hanging in catenary curves between its points of support, the trolley wire is suspended in parallelrelations with the trackway.

In order to secre a more perfectly uniform yielding elasticity in relation to the upward thrust of the traveling conductor in the so-called catenary system, the suspension of the trolley wire at the successive lower bights of a lacing interposed between the trolley wire and messenger cable in zigzag continuity, has been suggested, with manifest advantage because of the lessened and more uniform resistanceto the upward thrust of the traveling conductor at the suspension points. The use of a substantially continuous lacing cablel or wire, while offering substantial advantages, involves a difficulty .both in adjusting and re-adjusting the relative depths of the suspension loops or bights with respect to the catenary curves of the messenger-cable; which may varyby reason of stretching or other more or less permanent conditions.

'Itis the primary object of my inventionv to provide a mode of suspending the trolley wire from a messenger cable that shall afford all the advantages to be derived from suspension by a substantially continuous lacing cable or wire, yet avoid the disadvantages thereof'.

,To this end, it consists in a V-shaped the vertical depth may be increased or decreased by adjusting the fasteningsl upon the messenger cable toward or from each other, or

by lengthening or shortening the suspending arms of the hanger,when necessary, to of the trolley wire; providing for the upward conductor by an inthe hanger arms as motion of the trolat the same time thrust of the traveling dependent yielding o have invented new and 'upon the messenger cable.

wire or cablev ley wire under the upward pressure Tof the' traveling conductor.

My invention is shown in the accompanying drawing in side elevation attached to a messenger cable, exhibiting the trolley ear held by a common pivot to two adjacent flat links or strips of metal diverging to pivotal connections .with adjustable fastemngs -In the accompanying drawings, A designates the messenger cable suspended upon and hanging in catenary curves between suitable supports and B designates the trol- Iley wire hung from and vertically beneath the messenger cable by hangers varied in .length to 'accommodate thecurves of the-4 messenger cable and maintain the trolley wire -practically level and parallel with the track. A

The traveling conductor upon a car being upheld against the 'trolley wire by spring tension, it is desirable and especially necessary where high speed that the trolley wire should possess some yielding elasticity upward under the spring pressure of the traveling conductor, in order uninterrupted eonpreserved between the traveling conductor and the conducting` that smooth running an tact may be at all times wire. This general object is `best attaine by suspending the trolley wire from the messenger cable upon short strips hung at their` outer ends by fastenings, C, to the messenger cable, and allowed to into 'a V-shaped bight carrying at its lowest point a suitable ear D, forl holding the trolley wire B.

The fastening clips, C, consist of a pair of sister-hooks c, c, s1de by side, opening out? ward 'in opposite with a short tongue or rejection c1 'below the hook, and extendi g correspondingly outward, and both hooks merged at the shank into a slotted base, c2, through which from side to side is passed a bolt or pivot c3. The fastening clip thus formed is made of malleable metal so that when'placed upon the messenger cable7 the tongues c1 may be bent lupward to clasp the messenger cable firmly between themselves andthe hooks. For re-adjustment, the tongues may be pried slightly loose and again secured when the clip is shifted to its new position. rllwo clips are required' for each hanger, the hanger bcingcompleted by attahingto each cllp one end of relatively short strips of meta of cars is required sag between-- loo through the side Walls of the slot.

.pivot passes through a, short longitudinal E, extending into 'the slotted base, o?, and held by a pivot, 057 seated in red e strips at the lower apex of the biglh formed by the depending strips',-its Weight `keeping the divergent suspending strips of the henger in normal position es shown in the ,dran/ing. The upward thrust of the traveling conductor lirts the trolley eer or clamp,

causing'the strips to be moved longitudi-- nally upon the upper pivots, c3, as allowed by the slots, el, intothe positions indicated in the drawingby dotted lines. ris thus constructed, the trolley wire, B, may be edusted end maintained at a normal higher or .lower level by setting the clips, C5 nearer together or farther apart upon. the messen-v ger cable, A; While the temporary elevation of the trolley vWire to accommodate the wave motion caused bythe upward thrust of the traveling conductor is accomplished as above described The construczion .by 'which the strips areheld at both ends in lateral Contact between the side Walls of the containing permitting the oscillating :ind lo te motion. of the strips, prevents any l of the hanger sidewise and. holds i vertical planes of the messenger ozihlel The mode of operation lies been. sutiliently indicated in the for# going; description.

lt will he manifest that the znimiitagjoez oit' the invention een lio reslii d to :i greater: or less degree in siouetions '-.vliere o, messe ger cable is not usedfwas in covered bridge 1./ tunnels, ete., and such use l deem within the spirit of :ny invention.

if Claim my invention :ind desire lo secure by Letters Potent of the United A hanger 'for trolley/'Wires emliodg 'Y i.' combination :i trolley-ear, two 'flot of." metal seemed side by b v :i common pivot to a, trolley eer, :is its suspending itudiiml lume; o ille arms; and two nstenings or clips.: zxdoptm to secure the said arms to o. common over head support, each erin being :it tuelml io ils clip by a longitudinal slot o inging over :1 pivot or pin of the astenii Y permitlingi n longitudinal and :L pivotal motion.

n testimony whereof l have horountl' sei, my hand in presence oi.I two sulfisc'riliing; wil,- nesses.

O 'N EA 5 "Winnen 

